---
cve: "CVE-2026-42618"
severity: "HIGH"
cvss: 7.1
epss: "0.2%"
vendor: "n/a"
kev: false
exploited: false
published: "2026-10-07 14:17:09"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T11:36:35+01:00"
---

# CVE-2026-42618

> 7.1 HIGH · 🧪 PoC

## Beschreibung

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_decompress() in compress.c that allows an attacker to corrupt one byte of heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by reading the special crafted file.

## CNA-Record (Kanon, cvelistV5)

- CNA: **mitre**
- State: PUBLISHED
- Stand: 2026-10-07 14:31:31

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-122** — Heap-based Buffer Overflow
  The product writes past the end of a buffer that was allocated on the heap.
- **CWE-193** — Off-by-one Error
  A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

## Angriffsmuster (CAPEC)

- [CAPEC-92 — Forced Integer Overflow](https://capec.mitre.org/data/definitions/92.html) _(Severity: High)_

## Patch verfügbar (OSV)

- d327833ec1d5eb1358b6f2c37139f10a3460944d (Commit)

## Referenzen

- <https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-6whp-3f63-97qw>
- <https://github.com/tuxera/ntfs-3g/releases#release-2026.7.7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-42618/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_